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package vn.com.pps.common.util;


import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 *
 * @author Administrator
 */
public class DesEncrypter {

    Cipher ecipher;
    Cipher dcipher;
    byte[] salt = {(byte) 0xA9, (byte) 0x9B, (byte) 0xC8, (byte) 0x32, (byte) 0x56, (byte) 0x35,
        (byte) 0xE3, (byte) 0x03};

    public DesEncrypter(String passPhrase) throws Exception {
        int iterationCount = 2;
        KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount);
        SecretKey key = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(keySpec);
        ecipher = Cipher.getInstance(key.getAlgorithm());
        dcipher = Cipher.getInstance(key.getAlgorithm());
        AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount);

        ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
        dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
    }

    public String encrypt(String str) throws Exception {
        return new BASE64Encoder().encode(ecipher.doFinal(str.getBytes()));
    }

    public String decrypt(String str) throws Exception {
        return new String(dcipher.doFinal(new BASE64Decoder().decodeBuffer(str)));
    }
    
    public static void main(String arg[]) throws Exception{
        DesEncrypter desEncrypter = new DesEncrypter("PBEWithMD5AndDES");
        System.out.println("Root:"+desEncrypter.decrypt("UoERyXBdmD4="));
    }
}
